of these were to explode over a big city, that's the he said of the big city. i can't express this enough. so we could as human kind get together and go looking for these things. these things are going so fast, the atmosphere is just like concrete. >> i wanted our viewers to see this again because it really is so incredible when you look at the video and the sound there. is there any risk when you talk about the astroid getting so close to earth that the same thing could happen? >> this? oh, no. if that astroid would hit the earth that we're talking about today that's getting close, there would be significantly more damage than this. and, no, it is not going to happen. it does not get that close. it does get inside the big ring that we have, 22,000 miles in space. but if you take a look, if you make a sphere of that ring, you're talking about 8 million square miles of area out there and only just a few things to hit. we'll be just fine. the earth is in good shape and so are all the satellites. the odds are not zero, but i could probably win the lottery instead. >> were the russians warn that had